Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6051144 | Liquid filtration system and replaceable filter cartridge usable therewith | Robert A. Clack, Melvin R. Hemp, Richard E. Clack | 2000-04-18 |
| 5876610 | Method and apparatus for monitoring liquid flow through an enclosed stream | Robert A. Clack, Melvin R. Hemp | 1999-03-02 |